Metal complexes of polyamino acids, and their utilization in diagnostic imaging

摘要

PCT No. PCT/FR96/00992 Sec. 371 Date Dec. 29, 1997 Sec. 102(e) Date Dec. 29, 1997 PCT Filed Jun. 25, 1996 PCT Pub. No. WO97/01359 PCT Pub. Date Jan. 16, 1997The invention concerns gadolinium complexes of formula: <IMAGE> I in which R represents a group of formula: <IMAGE> in which X is Br or I; R1 is H or optionally hydroxylated alkyl; R2 is hydroxylated alkyl; or alternatively R1 is H and R2 is a group of formula: <IMAGE> A X being as defined above, and R'1 and R'2 being as defined for R1 and R2 excepted that they do not represent A, provided that -CO-NR1R2 or -CO-NR'1R'2 comprises at least 2 hydroxyl groups, and M represents H or the cation of an inorganic or organic base.